After the plans to start the war of independence on the 29 of September were discovered, Juan Aldama rode to Dolores to warn Miguel Hidalgo of the need to start earlier, so In the first hours of the morning of September 16th, 1810, Miguel Hidalgo called to arms at the Church of Dolores (now Dolores Hidalgo) in Guanajuato. That church is the one shown in the picture.

As it turned out, the celebration starts on the evening of the 15th since former president and dictator Porfirio Diaz (who was the Mexican president at the time the Revolution started 100 years latter) advanced the celebration one day to coinceed with his birthday, since, the tradition has been to ring the bells a day (well, a few hours) before the actual start.

This year Mexico will be celebrating the bicentenary of the Idependence and the centenary of the Revolution.